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Pictures: Four American women reach US Open semi-finals

Four American women have made it through to the semi-finals at the US Open in New York.
For the first time since 1981, four American women have made it through to the semi-finals at the US Open in New York.
Venus Williams, Coco Vandeweghe, Sloane Stephens and Madison KeysAFP
Venus Williams' victory over Petra Kvitova makes this her 23rd Grand Slam semi-final.
Venus WilliamsAllsport
The match went to three sets and was decided in a final-set tie-break, which Venus managed to edge.
Venus Williams and Petra KvitovaReuters
"I have to say I felt every single one of you guys behind me - all 23,000," Williams told the crowd. "I didn't want to let you guys down."
Venus WilliamsReuters
She'll play Sloane Stephens, who has reached the semi-finals at the US Open for the first time.
Sloane StephensReuters
Sloane, who is returning from a foot injury, beat Anastasija Sevastova 6-3 3-6 7-6 (7-4).
Sloane Stephens and Anastasija SevastovaEPA
Coco Vandeweghe reached the US Open semi-finals with a straight-set win.
Coco VandewegheAllsport
She beat Karolina Pliskova and also ended her reign as world number one. Wimbledon champion Garbine Muguruza will now take the top spot.
Karolina Pliskova and Coco VandewegheAllsport
Madison Keys was the last American through to the last four, beating Kaia Kanepi. "I was real nervous today," she said. "The car ride over I was definitely feeling it, but once I got out here I felt really good."
Madison KeysReuters